“We want to make Facebook into something of an operating system so you can run full applications,” Zuckerberg told me, saying it would be analogous to the platform that Microsoft Windows provides for developers. Outsiders can now develop Internet services on Facebook’s infrastructure, he explains, that will have full access to all its members. Just as it is when someone writes a program for Windows, programmers won’t need any permission from Facebook or any special business relationship with the company.

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